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Subject[PATCH 1/1] hv: Added new hv_utils driver with shutdown as first functionality - NO OUTLOOK

Resending this patch from my personal Linux server. Exchange server and
outlook at Microsoft seems to badly munge my patch. :(

From: Hank Janssen <hjanssen@sailtheuniverse.com>
Subject: [PATCH 1/1] hv: Added new hv_utils driver with shutdown as first functionality

Addition of new driver for Hyper-V called hv_utils.
This driver is intended to support things like KVP, Timesync, Heartbeat etc.

This first release has support for Gracefull shutdown.
e.g. Select shutdown from the Hyper-V main admin screen and the Linux VM
will do a gracefull shutdown.

Signed-off-by: Hank Janssen <microsoft.com>
Signed-off-by: Hank Janssen <sailtheuniverse.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>

---
drivers/staging/hv/Channel.c | 34 ++++++-
drivers/staging/hv/ChannelMgmt.c | 148 +++++++++++++++++++++++++++++++-
drivers/staging/hv/Kconfig | 6 ++
drivers/staging/hv/Makefile | 2 +
drivers/staging/hv/VmbusPacketFormat.h | 1 +
drivers/staging/hv/ext_utils.c | 27 ++++++
drivers/staging/hv/hyperv_utils.c | 134 +++++++++++++++++++++++++++++
drivers/staging/hv/utils.h | 94 ++++++++++++++++++++
8 files changed, 438 insertions(+), 8 deletions(-)
create mode 100644 drivers/staging/hv/ext_utils.c
create mode 100644 drivers/staging/hv/hyperv_utils.c
create mode 100644 drivers/staging/hv/utils.h

diff --git a/drivers/staging/hv/Channel.c b/drivers/staging/hv/Channel.c
index 328d3a0..de2ccb1 100644
--- a/drivers/staging/hv/Channel.c
+++ b/drivers/staging/hv/Channel.c
@@ -21,6 +21,7 @@
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/slab.h>
+#include <linux/module.h>
#include "osd.h"
#include "logging.h"
#include "VmbusPrivate.h"
@@ -666,8 +667,19 @@ void VmbusChannelClose(struct vmbus_channel *Channel)
DPRINT_EXIT(VMBUS);
}

-/*
- * VmbusChannelSendPacket - Send the specified buffer on the given channel
+/**
+ * VmbusChannelSendPacket() - Send the specified buffer on the given channel
+ * @Channel: Pointer to vmbus_channel structure.
+ * @Buffer: Pointer to the buffer you want to receive the data into.
+ * @BufferLen: Maximum size of what the the buffer will hold
+ * @RequestId: Identifier of the request
+ * @vmbus_packet_type: Type of packet that is being send e.g. negotiate, time
+ * packet etc.
+ *
+ * Sends data in @Buffer directly to hyper-v via the vmbus
+ * This will send the data unparsed to hyper-v.
+ *
+ * Mainly used by Hyper-V drivers.
*/
int VmbusChannelSendPacket(struct vmbus_channel *Channel, const void *Buffer,
u32 BufferLen, u64 RequestId,
@@ -711,6 +723,7 @@ int VmbusChannelSendPacket(struct vmbus_channel *Channel, const void *Buffer,

return ret;
}
+EXPORT_SYMBOL(VmbusChannelSendPacket);

/*
* VmbusChannelSendPacketPageBuffer - Send a range of single-page buffer
@@ -848,10 +861,20 @@ int VmbusChannelSendPacketMultiPageBuffer(struct vmbus_channel *Channel,
return ret;
}

-/*
- * VmbusChannelRecvPacket - Retrieve the user packet on the specified channel
+
+/**
+ * VmbusChannelRecvPacket() - Retrieve the user packet on the specified channel
+ * @Channel: Pointer to vmbus_channel structure.
+ * @Buffer: Pointer to the buffer you want to receive the data into.
+ * @BufferLen: Maximum size of what the the buffer will hold
+ * @BufferActualLen: The actual size of the data after it was received
+ * @RequestId: Identifier of the request
+ *
+ * Receives directly from the hyper-v vmbus and puts the data it received
+ * into Buffer. This will receive the data unparsed from hyper-v.
+ *
+ * Mainly used by Hyper-V drivers.
*/
-/* TODO: Do we ever receive a gpa direct packet other than the ones we send ? */
int VmbusChannelRecvPacket(struct vmbus_channel *Channel, void *Buffer,
u32 BufferLen, u32 *BufferActualLen, u64 *RequestId)
{
@@ -913,6 +936,7 @@ int VmbusChannelRecvPacket(struct vmbus_channel *Channel, void *Buffer,

return 0;
}
+EXPORT_SYMBOL(VmbusChannelRecvPacket);

/*
* VmbusChannelRecvPacketRaw - Retrieve the raw packet on the specified channel
diff --git a/drivers/staging/hv/ChannelMgmt.c b/drivers/staging/hv/ChannelMgmt.c
index 43f28f2..9c3069f 100644
--- a/drivers/staging/hv/ChannelMgmt.c
+++ b/drivers/staging/hv/ChannelMgmt.c
@@ -22,18 +22,22 @@
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/list.h>
+#include <linux/module.h>
#include "osd.h"
#include "logging.h"
#include "VmbusPrivate.h"
+#include "utils.h"

struct vmbus_channel_message_table_entry {
enum vmbus_channel_message_type messageType;
void (*messageHandler)(struct vmbus_channel_message_header *msg);
};

-#define MAX_NUM_DEVICE_CLASSES_SUPPORTED 4
+#define MAX_MSG_TYPES 1
+#define MAX_NUM_DEVICE_CLASSES_SUPPORTED 5
+
static const struct hv_guid
- gSupportedDeviceClasses[MAX_NUM_DEVICE_CLASSES_SUPPORTED] = {
+ gSupportedDeviceClasses[MAX_NUM_DEVICE_CLASSES_SUPPORTED] = {
/* {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f} */
/* Storage - SCSI */
{
@@ -69,8 +73,127 @@ static const struct hv_guid
0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5
}
},
+ /* 0E0B6031-5213-4934-818B-38D90CED39DB */
+ /* Shutdown */
+ {
+ .data = {
+ 0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49,
+ 0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB
+ }
+ },
};

+
+/**
+ * prep_negotiate_resp() - Create default response for Hyper-V Negotiate message
+ * @icmsghdrp: Pointer to msg header structure
+ * @icmsg_negotiate: Pointer to negotiate message structure
+ * @buf: Raw buffer channel data
+ *
+ * @icmsghdrp is of type &struct icmsg_hdr.
+ * @negop is of type &struct icmsg_negotiate.
+ * Set up and fill in default negotiate response message. This response can
+ * come from both the vmbus driver and the hv_utils driver. The current api
+ * will respond properly to both Windows 2008 and Windows 2008-R2 operating
+ * systems.
+ *
+ * Mainly used by Hyper-V drivers.
+ */
+void prep_negotiate_resp(struct icmsg_hdr *icmsghdrp,
+ struct icmsg_negotiate *negop,
+ u8 *buf)
+{
+ if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
+ icmsghdrp->icmsgsize = 0x10;
+
+ negop = (struct icmsg_negotiate *)&buf[
+ sizeof(struct vmbuspipe_hdr) +
+ sizeof(struct icmsg_hdr)];
+
+ if (negop->icframe_vercnt == 2 &&
+ negop->icversion_data[1].major == 3) {
+ negop->icversion_data[0].major = 3;
+ negop->icversion_data[0].minor = 0;
+ negop->icversion_data[1].major = 3;
+ negop->icversion_data[1].minor = 0;
+ } else {
+ negop->icversion_data[0].major = 1;
+ negop->icversion_data[0].minor = 0;
+ negop->icversion_data[1].major = 1;
+ negop->icversion_data[1].minor = 0;
+ }
+
+ negop->icframe_vercnt = 1;
+ negop->icmsg_vercnt = 1;
+ }
+}
+EXPORT_SYMBOL(prep_negotiate_resp);
+
+/**
+ * chn_cb_negotiate() - Default handler for non IDE/SCSI/NETWORK
+ * Hyper-V requests
+ * @context: Pointer to argument structure.
+ *
+ * Set up the default handler for non device driver specific requests
+ * from Hyper-V. This stub responds to the default negotiate messages
+ * that come in for every non IDE/SCSI/Network request.
+ * This behavior is normally overwritten in the hv_utils driver. That
+ * driver handles requests like gracefull shutdown, heartbeats etc.
+ *
+ * Mainly used by Hyper-V drivers.
+ */
+void chn_cb_negotiate(void *context)
+{
+ struct vmbus_channel *channel = context;
+ u8 *buf;
+ u32 buflen, recvlen;
+ u64 requestid;
+
+ struct icmsg_hdr *icmsghdrp;
+ struct icmsg_negotiate *negop = NULL;
+
+ buflen = PAGE_SIZE;
+ buf = kmalloc(buflen, GFP_ATOMIC);
+
+ VmbusChannelRecvPacket(channel, buf, buflen, &recvlen, &requestid);
+
+ if (recvlen > 0) {
+ icmsghdrp = (struct icmsg_hdr *)&buf[
+ sizeof(struct vmbuspipe_hdr)];
+
+ prep_negotiate_resp(icmsghdrp, negop, buf);
+
+ icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION
+ | ICMSGHDRFLAG_RESPONSE;
+
+ VmbusChannelSendPacket(channel, buf,
+ recvlen, requestid,
+ VmbusPacketTypeDataInBand, 0);
+ }
+
+ kfree(buf);
+}
+EXPORT_SYMBOL(chn_cb_negotiate);
+
+/*
+ * Function table used for message responses for non IDE/SCSI/Network type
+ * messages. (Such as KVP/Shutdown etc)
+ */
+struct hyperv_service_callback hv_cb_utils[MAX_MSG_TYPES] = {
+ /* 0E0B6031-5213-4934-818B-38D90CED39DB */
+ /* Shutdown */
+ {
+ .msg_type = HV_SHUTDOWN_MSG,
+ .data = {
+ 0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49,
+ 0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB
+ },
+ .callback = chn_cb_negotiate,
+ .log_msg = "Shutdown channel functionality initialized"
+ },
+};
+EXPORT_SYMBOL(hv_cb_utils);
+
/*
* AllocVmbusChannel - Allocate and initialize a vmbus channel object
*/
@@ -132,7 +255,8 @@ void FreeVmbusChannel(struct vmbus_channel *Channel)
}

/*
- * VmbusChannelProcessOffer - Process the offer by creating a channel/device associated with this offer
+ * VmbusChannelProcessOffer - Process the offer by creating a channel/device
+ * associated with this offer
*/
static void VmbusChannelProcessOffer(void *context)
{
@@ -140,6 +264,7 @@ static void VmbusChannelProcessOffer(void *context)
struct vmbus_channel *channel;
bool fNew = true;
int ret;
+ int cnt;
unsigned long flags;

DPRINT_ENTER(VMBUS);
@@ -209,6 +334,23 @@ static void VmbusChannelProcessOffer(void *context)
* can cleanup properly
*/
newChannel->State = CHANNEL_OPEN_STATE;
+ cnt = 0;
+
+ while (cnt != MAX_MSG_TYPES) {
+ if (memcmp(&newChannel->OfferMsg.Offer.InterfaceType,
+ &hv_cb_utils[cnt].data,
+ sizeof(struct hv_guid)) == 0) {
+ DPRINT_INFO(VMBUS, "%s",
+ hv_cb_utils[cnt].log_msg);
+
+ if (VmbusChannelOpen(newChannel, 2 * PAGE_SIZE,
+ 2 * PAGE_SIZE, NULL, 0,
+ hv_cb_utils[cnt].callback,
+ newChannel) == 0)
+ hv_cb_utils[cnt].channel = newChannel;
+ }
+ cnt++;
+ }
}
DPRINT_EXIT(VMBUS);
}
diff --git a/drivers/staging/hv/Kconfig b/drivers/staging/hv/Kconfig
index 4044702..79afb1e 100644
--- a/drivers/staging/hv/Kconfig
+++ b/drivers/staging/hv/Kconfig
@@ -29,4 +29,10 @@ config HYPERV_NET
help
Select this option to enable the Hyper-V virtual network driver.

+config HYPERV_UTILS
+ tristate "Microsoft Hyper-V Utilities driver"
+ default HYPERV
+ help
+ Select this option to enable the Hyper-V Utilities.
+
endif
diff --git a/drivers/staging/hv/Makefile b/drivers/staging/hv/Makefile
index 27ebae8..d2977ab 100644
--- a/drivers/staging/hv/Makefile
+++ b/drivers/staging/hv/Makefile
@@ -2,6 +2,7 @@ obj-$(CONFIG_HYPERV) += hv_vmbus.o
obj-$(CONFIG_HYPERV_STORAGE) += hv_storvsc.o
obj-$(CONFIG_HYPERV_BLOCK) += hv_blkvsc.o
obj-$(CONFIG_HYPERV_NET) += hv_netvsc.o
+obj-$(CONFIG_HYPERV_UTILS) += hv_utils.o

hv_vmbus-objs := vmbus_drv.o osd.o \
Vmbus.o Hv.o Connection.o Channel.o \
@@ -9,3 +10,4 @@ hv_vmbus-objs := vmbus_drv.o osd.o \
hv_storvsc-objs := storvsc_drv.o StorVsc.o
hv_blkvsc-objs := blkvsc_drv.o BlkVsc.o
hv_netvsc-objs := netvsc_drv.o NetVsc.o RndisFilter.o
+hv_utils-objs := hyperv_utils.o ext_utils.o
diff --git a/drivers/staging/hv/VmbusPacketFormat.h b/drivers/staging/hv/VmbusPacketFormat.h
index 79120bc..f9f6b4b 100644
--- a/drivers/staging/hv/VmbusPacketFormat.h
+++ b/drivers/staging/hv/VmbusPacketFormat.h
@@ -22,6 +22,7 @@
*/

#ifndef _VMBUSPACKETFORMAT_H_
+#define _VMBUSPACKETFORMAT_H_

struct vmpacket_descriptor {
u16 Type;
diff --git a/drivers/staging/hv/ext_utils.c b/drivers/staging/hv/ext_utils.c
new file mode 100644
index 0000000..a44cd1b
--- /dev/null
+++ b/drivers/staging/hv/ext_utils.c
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2010, Microsoft Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Authors:
+ * Haiyang Zhang <haiyangz@microsoft.com>
+ * Hank Janssen <hjanssen@microsoft.com>
+ */
+#include <linux/reboot.h>
+#include "utils.h"
+
+void shutdown_linux_system()
+{
+ orderly_poweroff(false);
+}
diff --git a/drivers/staging/hv/hyperv_utils.c b/drivers/staging/hv/hyperv_utils.c
new file mode 100644
index 0000000..2a48647
--- /dev/null
+++ b/drivers/staging/hv/hyperv_utils.c
@@ -0,0 +1,134 @@
+/*
+ * Copyright (c) 2010, Microsoft Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Authors:
+ * Haiyang Zhang <haiyangz@microsoft.com>
+ * Hank Janssen <hjanssen@microsoft.com>
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/sysctl.h>
+#include <linux/version.h>
+
+#include "logging.h"
+#include "osd.h"
+#include "vmbus.h"
+#include "VmbusPacketFormat.h"
+#include "VmbusChannelInterface.h"
+#include "VersionInfo.h"
+#include "Channel.h"
+#include "VmbusPrivate.h"
+#include "VmbusApi.h"
+#include "utils.h"
+
+
+void shutdown_onchannelcallback(void *context)
+{
+ struct vmbus_channel *channel = context;
+ u8 *buf;
+ u32 buflen, recvlen;
+ u64 requestid;
+ u8 execute_shutdown = false;
+
+ struct shutdown_msg_data *shutdown_msg;
+
+ struct icmsg_hdr *icmsghdrp;
+ struct icmsg_negotiate *negop = NULL;
+
+ DPRINT_ENTER(VMBUS);
+
+ buflen = PAGE_SIZE;
+ buf = kmalloc(buflen, GFP_ATOMIC);
+
+ VmbusChannelRecvPacket(channel, buf, buflen, &recvlen, &requestid);
+
+ if (recvlen > 0) {
+ DPRINT_DBG(VMBUS, "shutdown packet: len=%d, requestid=%lld",
+ recvlen, requestid);
+
+ icmsghdrp = (struct icmsg_hdr *)&buf[
+ sizeof(struct vmbuspipe_hdr)];
+
+ if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) {
+ prep_negotiate_resp(icmsghdrp, negop, buf);
+ } else {
+ shutdown_msg = (struct shutdown_msg_data *)&buf[
+ sizeof(struct vmbuspipe_hdr) +
+ sizeof(struct icmsg_hdr)];
+
+ switch (shutdown_msg->flags) {
+ case 0:
+ case 1:
+ icmsghdrp->status = HV_S_OK;
+ execute_shutdown = true;
+
+ DPRINT_INFO(VMBUS, "Shutdown request received -"
+ " gracefull shutdown initiated");
+ break;
+ default:
+ icmsghdrp->status = HV_E_FAIL;
+ execute_shutdown = false;
+
+ DPRINT_INFO(VMBUS, "Shutdown request received -"
+ " Invalid request");
+ break;
+ };
+ }
+
+ icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION
+ | ICMSGHDRFLAG_RESPONSE;
+
+ VmbusChannelSendPacket(channel, buf,
+ recvlen, requestid,
+ VmbusPacketTypeDataInBand, 0);
+ }
+
+ kfree(buf);
+
+ DPRINT_EXIT(VMBUS);
+
+ if (execute_shutdown == true)
+ shutdown_linux_system();
+}
+
+static int __init init_hyperv_utils(void)
+{
+ printk(KERN_INFO "Registering HyperV Utility Driver\n");
+
+ hv_cb_utils[HV_SHUTDOWN_MSG].channel->OnChannelCallback =
+ &shutdown_onchannelcallback;
+ hv_cb_utils[HV_SHUTDOWN_MSG].callback = &shutdown_onchannelcallback;
+
+ return 0;
+}
+
+static void exit_hyperv_utils(void)
+{
+ printk(KERN_INFO "De-Registered HyperV Utility Driver\n");
+
+ hv_cb_utils[HV_SHUTDOWN_MSG].channel->OnChannelCallback =
+ &chn_cb_negotiate;
+ hv_cb_utils[HV_SHUTDOWN_MSG].callback = &chn_cb_negotiate;
+}
+
+module_init(init_hyperv_utils);
+module_exit(exit_hyperv_utils);
+
+MODULE_DESCRIPTION("Hyper-V Utilities");
+MODULE_VERSION(HV_DRV_VERSION);
+MODULE_LICENSE("GPL");
diff --git a/drivers/staging/hv/utils.h b/drivers/staging/hv/utils.h
new file mode 100644
index 0000000..4e09804
--- /dev/null
+++ b/drivers/staging/hv/utils.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2009, Microsoft Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Authors:
+ * Haiyang Zhang <haiyangz@microsoft.com>
+ * Hank Janssen <hjanssen@microsoft.com>
+ */
+#ifndef _UTILS_H_
+#define _UTILS_H_
+
+/*
+ * Common header for Hyper-V ICs
+ */
+#define ICMSGTYPE_NEGOTIATE 0
+#define ICMSGTYPE_HEARTBEAT 1
+#define ICMSGTYPE_KVPEXCHANGE 2
+#define ICMSGTYPE_SHUTDOWN 3
+#define ICMSGTYPE_TIMESYNC 4
+#define ICMSGTYPE_VSS 5
+
+#define ICMSGHDRFLAG_TRANSACTION 1
+#define ICMSGHDRFLAG_REQUEST 2
+#define ICMSGHDRFLAG_RESPONSE 4
+
+#define HV_S_OK 0x00000000
+#define HV_E_FAIL 0x80004005
+#define HV_ERROR_NOT_SUPPORTED 0x80070032
+#define HV_ERROR_MACHINE_LOCKED 0x800704F7
+
+struct vmbuspipe_hdr {
+ u32 flags;
+ u32 msgsize;
+} __attribute__((packed));
+
+struct ic_version {
+ u16 major;
+ u16 minor;
+} __attribute__((packed));
+
+struct icmsg_hdr {
+ struct ic_version icverframe;
+ u16 icmsgtype;
+ struct ic_version icvermsg;
+ u16 icmsgsize;
+ u32 status;
+ u8 ictransaction_id;
+ u8 icflags;
+ u8 reserved[2];
+} __attribute__((packed));
+
+struct icmsg_negotiate {
+ u16 icframe_vercnt;
+ u16 icmsg_vercnt;
+ u32 reserved;
+ struct ic_version icversion_data[1]; /* any size array */
+} __attribute__((packed));
+
+struct shutdown_msg_data {
+ u32 reason_code;
+ u32 timeout_seconds;
+ u32 flags;
+ u8 display_message[2048];
+} __attribute__((packed));
+
+#define HV_SHUTDOWN_MSG 0
+
+struct hyperv_service_callback {
+ u8 msg_type;
+ char *log_msg;
+ unsigned char data[16];
+ struct vmbus_channel *channel;
+ void (*callback) (void *context);
+};
+
+extern void prep_negotiate_resp(struct icmsg_hdr *,
+ struct icmsg_negotiate *, u8 *);
+extern void shutdown_linux_system(void);
+extern void chn_cb_negotiate(void *);
+extern struct hyperv_service_callback hv_cb_utils[];
+
+#endif /* _UTILS_H_ */
--
1.6.0.2


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